– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Length: Committee structure
CIPM Consultative Committee:
  CCL: Consultative Committee for Length

CCL Working Groups:
  CCL-CCTF Frequency Standards Working Group (WGFS)
  CCL Working Group on Dimensional Nanometrology
  CCL Working Group on Strategic Planning
  CCL Working Group on the CIPM MRA
  CCL WG-MRA TG-L: Task Group on KC linking
  CCL WG-MRA sWG-CMC: Sub-group on CMCs and the DimVIM
  CCL WG-MRA sWG-KC: Sub-group on key comparisons
Unit of length (metre)
Committee structure
Recommended values of standard frequencies
Strategic plan
International equivalence

At the BIPM
BIPM contact person